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[UDF] JSON Array Contains function (#608)
* Add JSON Array Contains function * Add parametrization support * Add @test annotation * Add parametrization support * Add function reference to doc * Fix left brace style issue * Rename test functions * Remove unnecessary imports
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ksql-engine/src/main/java/io/confluent/ksql/function/udf/json/ArrayContainsKudf.java
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/** | ||
* Copyright 2017 Confluent Inc. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
**/ | ||
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package io.confluent.ksql.function.udf.json; | ||
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import com.fasterxml.jackson.core.JsonFactory; | ||
import com.fasterxml.jackson.core.JsonParser; | ||
import com.fasterxml.jackson.core.JsonToken; | ||
import io.confluent.ksql.function.KsqlFunctionException; | ||
import io.confluent.ksql.function.udf.Kudf; | ||
import io.confluent.ksql.util.ArrayUtil; | ||
import io.confluent.ksql.util.KsqlException; | ||
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import java.io.IOException; | ||
import java.util.Arrays; | ||
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import static com.fasterxml.jackson.core.JsonFactory.Feature.CANONICALIZE_FIELD_NAMES; | ||
import static com.fasterxml.jackson.core.JsonToken.END_ARRAY; | ||
import static com.fasterxml.jackson.core.JsonToken.START_ARRAY; | ||
import static com.fasterxml.jackson.core.JsonToken.VALUE_FALSE; | ||
import static com.fasterxml.jackson.core.JsonToken.VALUE_NULL; | ||
import static com.fasterxml.jackson.core.JsonToken.VALUE_NUMBER_FLOAT; | ||
import static com.fasterxml.jackson.core.JsonToken.VALUE_NUMBER_INT; | ||
import static com.fasterxml.jackson.core.JsonToken.VALUE_STRING; | ||
import static com.fasterxml.jackson.core.JsonToken.VALUE_TRUE; | ||
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public class ArrayContainsKudf | ||
implements Kudf { | ||
private static final JsonFactory JSON_FACTORY = new JsonFactory() | ||
.disable(CANONICALIZE_FIELD_NAMES); | ||
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@Override | ||
public void init() { | ||
} | ||
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@Override | ||
public Object evaluate(Object... args) { | ||
if (args.length != 2) { | ||
throw new KsqlFunctionException("ARRAY_CONTAINS udf should have two input argument. Given: " + Arrays.toString(args)); | ||
} | ||
Object searchValue = args[1]; | ||
if(args[0] instanceof String) { | ||
return jsonStringArrayContains(searchValue, (String) args[0]); | ||
} else if(args[0] instanceof Object[]) { | ||
return ArrayUtil.containsValue(searchValue, (Object[]) args[0]); | ||
} | ||
throw new KsqlFunctionException("Invalid type parameters for " + Arrays.toString(args)); | ||
} | ||
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private boolean jsonStringArrayContains(Object searchValue, String jsonArray) { | ||
JsonToken valueType = getType(searchValue); | ||
try (JsonParser parser = JSON_FACTORY.createParser(jsonArray)) { | ||
if (parser.nextToken() != START_ARRAY) { | ||
return false; | ||
} | ||
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while (parser.currentToken() != null) { | ||
JsonToken token = parser.nextToken(); | ||
if (token == null) { | ||
return searchValue == null; | ||
} | ||
if (token == END_ARRAY) { | ||
return false; | ||
} | ||
parser.skipChildren(); | ||
if (valueType == token) { | ||
if (valueType == VALUE_NULL && searchValue == null) { | ||
return true; | ||
} else if ((valueType == VALUE_STRING) | ||
&& parser.getText().equals(searchValue)) { | ||
return true; | ||
} else if((valueType == VALUE_FALSE || valueType == VALUE_TRUE) | ||
&& (parser.getBooleanValue() == (boolean)searchValue)) { | ||
return true; | ||
} else if((valueType == VALUE_NUMBER_INT)) { | ||
if(searchValue instanceof Integer && parser.getIntValue() == (int) searchValue) { | ||
return true; | ||
} else if(searchValue instanceof Long && parser.getLongValue() == (long) searchValue) { | ||
return true; | ||
} | ||
} else if((valueType == VALUE_NUMBER_FLOAT) | ||
&& parser.getDoubleValue() == (double)searchValue) { | ||
return true; | ||
} | ||
} | ||
} | ||
} | ||
catch (IOException e) { | ||
throw new KsqlException("Invalid JSON format: " + jsonArray, e); | ||
} | ||
return false; | ||
} | ||
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/** | ||
* Returns JsonToken type of the targetValue | ||
*/ | ||
private JsonToken getType(Object searchValue) { | ||
if(searchValue instanceof Long || searchValue instanceof Integer) { | ||
return VALUE_NUMBER_INT; | ||
} else if(searchValue instanceof Double) { | ||
return VALUE_NUMBER_FLOAT; | ||
} else if(searchValue instanceof String) { | ||
return VALUE_STRING; | ||
} else if(searchValue == null) { | ||
return VALUE_NULL; | ||
} else if(searchValue instanceof Boolean) { | ||
boolean value = (boolean) searchValue; | ||
return value ? VALUE_TRUE : VALUE_FALSE; | ||
} | ||
throw new KsqlFunctionException("Invalid Type for search value " + searchValue); | ||
} | ||
} |
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ksql-engine/src/test/java/io/confluent/ksql/function/udf/json/ArrayContainsKudfTest.java
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package io.confluent.ksql.function.udf.json; | ||
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import org.junit.Before; | ||
import org.junit.Test; | ||
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import static org.junit.Assert.assertEquals; | ||
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public class ArrayContainsKudfTest | ||
{ | ||
private ArrayContainsKudf jsonUdf = new ArrayContainsKudf(); | ||
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@Before | ||
public void setUp() { | ||
jsonUdf.init(); | ||
} | ||
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@Test | ||
public void shouldReturnFalseOnEmptyArray() { | ||
assertEquals(false, jsonUdf.evaluate("[]", true)); | ||
assertEquals(false, jsonUdf.evaluate("[]", false)); | ||
assertEquals(false, jsonUdf.evaluate("[]", null)); | ||
assertEquals(false, jsonUdf.evaluate("[]", 1.0)); | ||
assertEquals(false, jsonUdf.evaluate("[]", 100)); | ||
assertEquals(false, jsonUdf.evaluate("[]", "abc")); | ||
assertEquals(false, jsonUdf.evaluate("[]", "")); | ||
} | ||
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@Test | ||
public void shouldNotFindValuesInNullArray() { | ||
assertEquals(true, jsonUdf.evaluate("[null]", null)); | ||
assertEquals(false, jsonUdf.evaluate("[null]", "null")); | ||
assertEquals(false, jsonUdf.evaluate("[null]", true)); | ||
assertEquals(false, jsonUdf.evaluate("[null]", false)); | ||
assertEquals(false, jsonUdf.evaluate("[null]", 1.0)); | ||
assertEquals(false, jsonUdf.evaluate("[null]", 100)); | ||
assertEquals(false, jsonUdf.evaluate("[null]", "abc")); | ||
assertEquals(false, jsonUdf.evaluate("[null]", "")); | ||
} | ||
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@Test | ||
public void shouldFindIntegersInJsonArray() { | ||
String json = "[2147483647, {\"ab\":null }, -2147483648, 1, 2, 3, null, [4], 4]"; | ||
assertEquals(true, jsonUdf.evaluate(json, 2147483647)); | ||
assertEquals(true, jsonUdf.evaluate(json, -2147483648)); | ||
assertEquals(true, jsonUdf.evaluate(json, 1)); | ||
assertEquals(true, jsonUdf.evaluate(json, 2)); | ||
assertEquals(true, jsonUdf.evaluate(json, 3)); | ||
assertEquals(false, jsonUdf.evaluate("5", 5)); | ||
assertEquals(false, jsonUdf.evaluate(json, 5)); | ||
} | ||
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@Test | ||
public void shouldFindLongsInJsonArray() { | ||
assertEquals(true, jsonUdf.evaluate("[1]", 1L)); | ||
assertEquals(true, jsonUdf.evaluate("[1111111111111111]", 1111111111111111L)); | ||
assertEquals(true, jsonUdf.evaluate("[[222222222222222], 33333]", 33333L)); | ||
assertEquals(true, jsonUdf.evaluate("[{}, \"abc\", null, 1]", 1L)); | ||
assertEquals(false, jsonUdf.evaluate("[[222222222222222], 33333]", 222222222222222L)); | ||
assertEquals(false, jsonUdf.evaluate("[{}, \"abc\", null, [1]]", 1L)); | ||
assertEquals(false, jsonUdf.evaluate("[{}, \"abc\", null, {\"1\":1}]", 1L)); | ||
} | ||
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@Test | ||
public void shouldFindDoublesInJsonArray() { | ||
assertEquals(true, jsonUdf.evaluate("[-1.0, 2.0, 3.0]", 2.0)); | ||
assertEquals(true, jsonUdf.evaluate("[1.0, -2.0, 3.0]", -2.0)); | ||
assertEquals(true, jsonUdf.evaluate("[1.0, 2.0, 1.6E3]", 1600.0)); | ||
assertEquals(true, jsonUdf.evaluate("[1.0, 2.0, -1.6E3]", -1600.0)); | ||
assertEquals(true, jsonUdf.evaluate("[{}, \"abc\", null, -2.0]", -2.0)); | ||
assertEquals(false, jsonUdf.evaluate("[[2.0], 3.0]", 2.0)); | ||
} | ||
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@Test | ||
public void shouldFindStringsInJsonArray() { | ||
assertEquals(true, jsonUdf.evaluate("[\"abc\"]", "abc")); | ||
assertEquals(true, jsonUdf.evaluate("[\"cbda\", \"abc\"]", "abc")); | ||
assertEquals(true, jsonUdf.evaluate("[{}, \"abc\", null, 1]", "abc")); | ||
assertEquals(true, jsonUdf.evaluate("[\"\"]", "")); | ||
assertEquals(false, jsonUdf.evaluate("[\"\"]", null)); | ||
assertEquals(false, jsonUdf.evaluate("[1,2,3]", "1")); | ||
assertEquals(false, jsonUdf.evaluate("[null]", "")); | ||
assertEquals(false, jsonUdf.evaluate("[\"abc\", \"dba\"]", "abd")); | ||
} | ||
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@Test | ||
public void shouldFindBooleansInJsonArray() { | ||
assertEquals(true, jsonUdf.evaluate("[false, false, true, false]", true)); | ||
assertEquals(true, jsonUdf.evaluate("[true, true, false]", false)); | ||
assertEquals(false, jsonUdf.evaluate("[true, true]", false)); | ||
assertEquals(false, jsonUdf.evaluate("[false, false]", true)); | ||
} | ||
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@Test | ||
public void shouldFindStringInAvroArray() { | ||
assertEquals(true, jsonUdf.evaluate(new String[]{"abc", "bd", "DC"}, "DC")); | ||
assertEquals(false, jsonUdf.evaluate(new String[]{"abc", "bd", "DC"}, "dc")); | ||
assertEquals(false, jsonUdf.evaluate(new String[]{"abc", "bd", "1"}, 1)); | ||
} | ||
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@Test | ||
public void shouldFindIntegersInAvroArray() { | ||
assertEquals(true, jsonUdf.evaluate(new Integer[]{1, 2, 3}, 2)); | ||
assertEquals(false, jsonUdf.evaluate(new Integer[]{1, 2, 3}, 0)); | ||
assertEquals(false, jsonUdf.evaluate(new Integer[]{1, 2, 3}, "1")); | ||
assertEquals(false, jsonUdf.evaluate(new Integer[]{1, 2, 3}, "aa")); | ||
} | ||
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@Test | ||
public void shouldFindLongInAvroArray() { | ||
assertEquals(true, jsonUdf.evaluate(new Long[]{1L, 2L, 3L}, 2L)); | ||
assertEquals(false, jsonUdf.evaluate(new Long[]{1L, 2L, 3L}, 0L)); | ||
assertEquals(false, jsonUdf.evaluate(new Long[]{1L, 2L, 3L}, "1")); | ||
assertEquals(false, jsonUdf.evaluate(new Long[]{1L, 2L, 3L}, "aaa")); | ||
} | ||
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@Test | ||
public void shouldFindDoublesInAvroArray() { | ||
assertEquals(true, jsonUdf.evaluate(new Double[]{1.0, 2.0, 3.0}, 2.0)); | ||
assertEquals(false, jsonUdf.evaluate(new Double[]{1.0, 2.0, 3.0}, 4.0)); | ||
assertEquals(false, jsonUdf.evaluate(new Double[]{1.0, 2.0, 3.0}, "1")); | ||
assertEquals(false, jsonUdf.evaluate(new Double[]{1.0, 2.0, 3.0}, "aaa")); | ||
} | ||
} |